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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 121. | R1221N45XC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 122. | R1221N45XD-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 123. | R1221N45XE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 124. | R1221N45XF-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 125. | R1221N45XG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 126. | R1221N45XG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 127. | R1221N45XH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 128. | R1223N452A-TL | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 129. | R1223N452A-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 130. | R1223N452B-TL | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 131. | R1223N452B-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 132. | R1223N452C-TL | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 133. | R1223N452C-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 134. | R1223N452D-TL | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 135. | R1223N452D-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 136. | R1223N452E-TL | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Reset-type protection. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 137. | R1223N452E-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 138. | R1223N452F-TL | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Reset-type protection. Taping specification TL | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 139. | R1223N452F-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 140. | R1223N452G-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.5V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
